Ferdinaxd julius bluthxer



(NoModL) F. J. BLUTHNER, Jr.

PIANO FORTE ATTACHMENT.

No. 395,029. Patented Dec. 25, 1888.

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UNITED STATES PATENT OFFICE.

FERDINAND JULIUS BLI 'TIINER, JR, OF LEIPSH, SAXON'Y, GERMANY.

PIANO-FORTE ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 395,029, dated December 25, 1888.

Application filed August '7, 1888. Serial No. 282,125. [No model.

To aZZ whom it may concern.-

Be it known that I, FERDINAND J ULIUs BLUTHNER, J12, of Leipsic, in the Kingdom of Saxony, Germany, have invented a new and Improved Piano-Forte Attachment, of which the following is a specification.

This invention relates to an attachment for piano-fortes, by means of which the so-called janco keys are made to act upon the ordinarily-arranged keys. Thus a piano built in the old style can be played upon by the new keys.

The invention consists in the various features of improvement, more fully pointed out in the claims.

In the accompanying drawings, Figure l is a vertical transverse section through my attachment, showing the key raised. Fig. 2 is a similar section through its principal parts, showing the key depressed.

The letter (t represents the forward part of an ordinary piano, having the white keys I) and black keys 0.

A is acase of the same height as the piano and containing the new style or janco keys (I, turning on the pivots e. The case A is provided with rearwardly-extending lugs f, having clamp-screws g, by means of which the case may be rigidly united to the piano.

Each key (I is provided with a link, 71, acting upon one end of a lever, '2', that turns on fulcrum The other end of this lever acts by link it upon lever '01, turning on fulcrum n. The free end of lever on carries an adjustable screw, 1.), that rests with its cushioned head upon one of the keys of piano a. Some of the screw-heads rest upon the white keys 1) and some upon the black keys 0, as shown. In use the motion of the janco keys will be transmitted to the keys of the instrument a.

In order to permit the operation of the pedal q of the piano (4 the attachment A has the pedal 7', that acts upon the pedal q through the levers s t and binding-screw u.

\Vhat I claim is l. The combination of case A, having janco keys d, with the links 74, lovers 1' m, and cushioned screws 19, substantially as specified.

2. The combination of case A, having lugs f and clamp-screws g, with the janco keys Ll,

links 72, levers 1' m, and screws 11, substantially as specified.

The combination of case A, with pedal r, levers s t, andbimling-screw u, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FERDINAND JULIUS BLL'TllNER, JR.

\Yitnesses:

EDMUND BACHS, )IAX MATTIISI. 

